Picture-slide controller for stereopticons.



PATENTED AUG. 14, 1906.

A. K. WAIT. PICTURE SLIDE CONTROLLER FOR STEREOPTIGONS.

APPLICATION ,IILED MAK.30,1906.

2 SHEETSSHEET 1.

[NVENTOR A TTORNE Y5 W1 TNESSES:

No. 828,790. PATENTED'AUG. '14, 1906.

A. K. WAIT. PICTURE SLIDE CONTROLLER FOR STERBOPTIOONS.

APPLICATION FILED MAR. 30.1906.

' 2 SHEETS-SHEET 2.

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rnrrrnn srn rng p gnnr AltTl-IUR K. lVAlT, OF ROANOKE, VIRGINIA.

Specification of Letters Patent.

Patented Aug. 14, 1906.

Application filed March 30.1906. Serial No. 308,942.

To a]! whom, it nmy concern:

Be it known that I, ARTHUR K. WAIT, a citizen of the United States,residing at Roanoke, in the county of Roanoke and State of Virginia,have invented anew and useful Picture-Slide Controller forStereopticons, of which the following is a specification.

This invention is an attachment for stereopticons and the like, and hasfor its object to rovide for bringingh picture-slides into and out ofthe path of lig. t without manually handling each and every slide,thereby to facilitate the manipulation of the stereopticon and to makethe change of plates rapidly or slowly, as may be desired.

In order that the attachment may occupy as small a space as possible, itis proposed to have the attachment include a rotary drum or slide-holderwith the slides radially carried thereby and capable of being withdrawnfrom the carrier into the path of light and then returned into thecarrier while a stepby-step rotary movement is being imparted to thecarrier, so as to bring the successive lates into position for movementinto and out of the path oflight It is a further object of the inventionto adapt the attachment for use in connection with any conventional formof stereopticon or picture-exhibitor Wit/b01113 altering or changing thesame in any material manner whatsoever.

With these and other objects in view the present invention consists inthe combination and arrangement of parts, as will be hereinafter morefully descrlbed, shown in the accompanying drawings, and particularlypointed out in the appended c aims, it being understood that changes inthe form pro ortion, size, and minor details may be ma e within thescope' of the claims without departing from the spirit or sacrificingany of the advantages of the invention.

In the drawings, Figure l'is a side elevation of a conventional form ofstereopticon equipped with the slide-controlling attachment of thepresent invention. Fig. 2 is a plan view with the slide-carrier removed.Fig. 3 is a plan view of the slide-carrier. Fig. 4 is a sectional viewon the line 4 4 of Fig. Fig. on an enlarged detail sectional view on theline 5 5 of Fig. 4.

Like characters of reference designate corresponding parts in all of thefigures \of the drawings.

For the adequate understanding of the application and operation of thepresent inven tion a conventional form of stereopticon orpicture-exhibitor has been shown in the accompanying drawings, includinga light-box or lantern 1, mounted upon a suitable base 2 and providedwith the usual condensing-lens tubular frame 3. In front of thecondensinglens tube there is the usual magnifying-lens tube 4, connectedto the front end of a bellows 5, the rear end of which is carried by astationary upright frame 6, while its front end and the lens-tube 5 arecarried by an upright adjustable frame '7, movable toward and away fromthe frame 6. A gage-rod 8 extends. rearwardly from the frame 7 andpasses throu h guides 9 and 10 upon the ame 6 and t e lantern 1, therebein a suitable set-screw 11, carried by the guide 9', for engagementwith the rod 8, so as to fix'the frame 7 whenit has been properlyadjusted according to the distance between the stere opticon andthescreen upon which the pictures are to be cast. These parts are commonand well known and of themselves form no art of the present invention.

11 carrying out the present invention there is provided a rotarypicture-slide carrier, preferably in the nature of a drum, includingspaced heads 12 and 13, carried by a shaft 14, having each end supportedin a suitable bracket 15, rising from the bed or base 2. In the innerface of each head there is a series of radial grooves or guideways 16,which are open at their outer ends and are closed at their inner ends bysuitable shoulders 17. It will of course be understood that the groovesor guideways of the two heads are in alinement in order that each pairof corresponding grooves may receive a picture-slide which issupportedupon the shoulders 17. and is capable of being moved outwardlythrough the open outer ends of the grooves. This pic ture-slide carrieris mounted above tlie'condensing-lens of the stereopticon in suchposition that when each pair of guideways is brought into a verticalosition at the lower side of the carrier sai guideways will be alinedwith the space between the condensing'lens and the magnifying-lens,whereby the picture-slide in said grooves may be lowered into the pathof light and then returned into the same air of grooves after thedesired exposure as been made.

For the sup ort of the slides during the lower half of t e path of theirrotary movement there is.

elements 18 and 19 in the nature of arcuate stri s or plates embracingthe lower periphera portions of the drums between the heads 12 and 13.The inner end portions of the members 18 and 19 are connected to asuitable rectangular bracket 20, which is in turn carried by thestandards 15, so as to support the guard members 18 and 19 independentlyof any portion of the stereopticon. The inner or lower ends of theguards have the respective downturned lips 21 and 22, which are spacedat a suitable interval, so as to guide a plate downwardly from thecarrier Into the space between t e condensing and magn' g lenses.

With the slide-carrier rotating in the direction of'the arrow in Fig. 1of the drawings the uard member 18 supports those slides Whic areapproaching a vertical position, and when the slides come into alinementwith .the space between the two guards they drop downwardly, and afterthey have been returned into the carrier the guard 19 su ports themuntil they pass into the upper l ialf of their rotary path.

For the purpose of supporting each slide in the path oflight and alsofor returning the slide into the carrier a cross-head 23 is mounted toslide vertically in front of the condensinglens and is provided at eachend with a pro jection or trunnion 24, working in a longitudinal slot inthe front free end of a verticallyswinging lever 25, fulcrumed adjacentits rear end upon a suitable bracket 26, rising from the bed or base 2.The levers or arms 25 he at opposite sides of the lantern 1 and aresimultaneously operated to raise and lower the cross-head, the downwardmovement ofthe latter being limited by means of bars 27 ,applied toopposite sides of the lantern and extending between the latter and thefixed frame 6. A

The means for operating the levers 25 consis'ts of a substantiallyhorizontal rock-bar 28, mounted at each end in a suitablebearing-bracket 29, rising from the base 2 and provided with a pairofcams or tappet pro- JGOtiOIlS 30, .dis osed for simultaneousengagement with t e rear extremities of the levers 25. This rock-bar isadapted to be driven by hand or by power, a crank-handle 31 having beenshown in Figs. 1 and 2 as an appropriate means for operating therock-bar. A step-by-step rotary movement is imparted to thepicture-slide carrier by means of a lever 32, fulcrumed intermediate ofits ends upon a bearing-bracket 33, rising from the base 2, the rearfree end of the lever having a downwardly-extending heel 34 forengagement by a cam or tappet 35, carried by the rock-bar .28. The frontend of the lever 32 is provided witha pivotal do 36, cooperatingwitli aseries of ratchet-teeth 37, provided upon the head 12 of the'itureeelide carrier.

provided a pair of supporting I or tappets 30 engage the levers 25, andthereby hit the cross-head 23 and the slide A until the latter has beenmoved back into the car rier. Before the cams 3O disengage the levers 25the cam 35 engages theheel 34 of the lever 32, and thereby imparts arotary movement to the move the slide A from the cross-head to the guard19, so as to be supported thereby when the crossehead descends. Theseveral parts of the attachment are so proportioned that when the cam 35disengages the lever 32 and the rotary movement of the carrier is thusstopped the cams '30 will then disengage the levers 25, and thus permitthe cross-head to descend with the next in rear slide supported thereon.The length of time for any exposure may be governed by the manipulationof the shaft 28, and the picture-slides will be brought into the path oflight and then re-/ turned into the carrier in a prompt and posi tivemanner without manually handling the individual slides, therebymaterially facilitating the handling of the apparatus.

Having thus described the invention, what is claimed is 1. In anapparatus of the class described, the combination of a rotary carrierhaving radial guideways provided with open outer ends for the receptionof picture-slides, a guard embracing the open outer ends of theguideways to retain the picture-slides therein. and provided with anopening with which the guideways are adapted to successively regis terfor the outward movement of the slides through the opening, an annularseries of ratchet-teeth for the carrier. a lever having a dog associatedwith the ratchetteeth, a swinging arm carrying a cross-head alined withthe o ening in the uard and working toward and away from tlie same, anda rotary shaft having a plurality of -cams adapted to engage and operatethe lever and the arm.

2. The combination with a stereopticon, of a rotary picture-slidecarrier mounted. above the stereopticon and provided with radialguideways open at their outer ends for the reception of picture-slides,said, carrier having ratchet-teeth, a guard embracing the lower side ofthe carrier to retain the pictureslides in the ing in alinement with thepicture-slide guide of the stereopticon and with which the guideways areadapted to successively register for the discharge of thepicture-slides, a picture slide support working in the picture-guide oithe stereoptieon, pivotal arms mounted at opposite sides ofathestereopticon and con nectedto the picture-slide support, a lever Mpicture-carrier sufficiently to.

guideways and having an open:

having a dog to engage the teeth of the picture-carrier, and a shafthaving a crank-handle at one end and a plurality of cams adapted toengage the pivotal arms and the lever at ilitl'erent times for operatingthe same.

3. The combination of a stereopticon having a vertical slotadjacent theforward end thereof, a rotary picture-slide carrierrnounted above thestereopticon and provided with radial grooves, said carrier havingratchetteeth, a pair of parallel pivotal arms extending along oppositesides of the stereopticon and having longitudinal slots in their forwardends, a cross-head extending through the vertical slot in thestereopticon and having trunnions engaging the longitudinal slots of thepivotal arms, uprights for supporting ported adjacent the rear ends ofthe the pivotal arms, an independent lever having a dog to engage theratchet-teeth of the picture-carrier, an upright for supsaid independentlever, a shaft supivotal arms and independent lever, said sha t having apair of cams for operating the pivotal arms, and a separate cam for oerating the independent lever, and acran -handle for said shaft.

In testimony that I claim the foregoing as my own I have hereto aflixedmy signature in the presence of two witnesses.

- ARTHUR WAIT.

rotary porting Witnesses:

W. THOMAS, W. O. ALLEN.

